Gallons to Liters Converter
Gallons to Liters Converter
Gallons to liters is the reverse of liters-to-gallons, needed whenever a US-denominated fuel, paint, or beverage quantity in gallons needs to be understood in metric terms.
This tool isn't limited to a single pair: the "From" and "To" dropdowns cover the full range of volume units — metric (milliliters through cubic meters), US customary (fluid and dry gallons, quarts, pints, cups, ounces, tablespoons, teaspoons), Imperial (UK gallons, pints, gills), and specialized units (barrels, bushels, pecks, hogsheads, cords, acre-feet).
- Conversion factor: 1 U.S. fluid gallon = exactly 3.785411784 liters, by legal US definition.
- Fully flexible: change either dropdown to convert between any two of the 40+ supported volume units — metric, US customary, Imperial, and specialized measures.
- Watch for "which gallon": this converter defaults to the U.S. fluid gallon — select "Gallon (Imperial)" instead if your source is UK-based, since it's about 20% larger.
How many liters are in a gallon?
1 U.S. gallon equals exactly 3.785411784 liters. To convert gallons to liters, multiply the gallon value by 3.785412.
Can I convert liters back to gallons with this tool?
Yes — just swap the "From" and "To" selectors to Liter and Gallon (U.S. fluid) respectively; the same widget handles both directions and any other unit pair.
Gallons to Liters Converter
Gallons to liters is the reverse of liters-to-gallons, needed whenever a US-denominated fuel, paint, or beverage quantity in gallons needs to be understood in metric terms.
This tool isn't limited to a single pair: the "From" and "To" dropdowns cover the full range of volume units — metric (milliliters through cubic meters), US customary (fluid and dry gallons, quarts, pints, cups, ounces, tablespoons, teaspoons), Imperial (UK gallons, pints, gills), and specialized units (barrels, bushels, pecks, hogsheads, cords, acre-feet).
- Conversion factor: 1 U.S. fluid gallon = exactly 3.785411784 liters, by legal US definition.
- Fully flexible: change either dropdown to convert between any two of the 40+ supported volume units — metric, US customary, Imperial, and specialized measures.
- Watch for "which gallon": this converter defaults to the U.S. fluid gallon — select "Gallon (Imperial)" instead if your source is UK-based, since it's about 20% larger.
How many liters are in a gallon?
1 U.S. gallon equals exactly 3.785411784 liters. To convert gallons to liters, multiply the gallon value by 3.785412.
Can I convert liters back to gallons with this tool?
Yes — just swap the "From" and "To" selectors to Liter and Gallon (U.S. fluid) respectively; the same widget handles both directions and any other unit pair.